| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Benítez, Chivilcoy | B6632 XAA |
| Postal/ZIP Codes in Chivilcoy, Chivilcoy | B6620, B6622 |
| Postal/ZIP Codes in Emilio Ayarza, Chivilcoy | B6628 XAF |
| Postal/ZIP Codes in Gorostiaga, Chivilcoy | B6632 XAB |
| Postal/ZIP Codes in Haras El Carmen, Chivilcoy | B6627 XAC |
| Postal/ZIP Codes in Henry Bell, Chivilcoy | B6621 XAC |
| Postal/ZIP Codes in Indacochea, Chivilcoy | B6623 XAA |
| Postal/ZIP Codes in La Carlota, Chivilcoy | B6628 XAG |
| Postal/ZIP Codes in La Dormilona, Chivilcoy | B6628 XAH |
| Postal/ZIP Codes in La Rica, Chivilcoy | B6623 XAB |
| Postal/ZIP Codes in Puente Batalla, Chivilcoy | B6620 XAA |
| Postal/ZIP Codes in Ramón Biaus, Chivilcoy | B6627 XAB |
| Postal/ZIP Codes in San Sebastián, Chivilcoy | B6623 XAC |
| Postal/ZIP Codes in Villa Moquehua, Chivilcoy | B6625 |